Serial killer Samuel Little, who has confessed to 90 murders, has drawn 16 of his alleged victims as the FBI works to connect him to old cold cases around the U.S. (FBI handouts)

Samuel Little, a serial killer serving life in prison who claims to have killed 90 women, has provided 16 portraits of women he purportedly killed to the FBI as law enforcement officers scramble to identify as many as 90 of his alleged victims. The FBI has released the drawings to the public in the hope that family or friends of the women could help identify them.

Little was convicted in 2004 for the killings of three women in California in 1987 and 1989, and has been confirmed as the perpetrator of at least 34 more murders since he began confessing to law enforcement officials in November. Another eight of his confessions have recently been confirmed or linked to open cases, the FBI said Tuesday. According to the FBI, more than half of Little’s confessions remain unconfirmed — in part because authorities at the time often didn’t bothered to identify or investigate the deaths of his victims, most of whom were “marginalized” or transgender women.

In a summary of the case on the FBI website, crime analyst Christina Palazzolo said that Little, a boxer, liked to knock out his victims with punches before strangling them to death — providing little evidence to forensic investigators to prove that the victims were murdered. Given the lack of strong evidence and the willful disregard of his victims’s rights by society, many of whom were sex workers and transgender women, many of the deaths likely were not investigated or were ruled accidental deaths.

“Little chose to kill marginalized and vulnerable women who were often involved in prostitution and addicted to drugs. Their bodies sometimes went unidentified and their deaths uninvestigated,” the FBI said. Their current goal, they added, “is to identify his victims and provide closure and justice in unsolved cases.”

This is a disgrace. Where is the UK foreign office in all of this? Aras Amiri now joins another British-Iranian, Nazanin Zaghari-Ratcliffe, in notorious Evin prison on bogus charges. @foreignofficehttps://t.co/DJX0knhdot